CN219530085U

CN219530085U - Hydraulic movable joint

Info

Publication number: CN219530085U
Application number: CN202320749494.8U
Authority: CN
Inventors: 杨飞权; 杨志敏
Original assignee: Zhejiang Maixing Machinery Co ltd
Current assignee: Zhejiang Maixing Machinery Co ltd
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2023-08-15
Anticipated expiration: 2033-04-07

Abstract

The utility model provides a hydraulic movable joint, and belongs to the field of engineering machinery. It has solved the complicated problem of current hydraulic movable joint structure. The hydraulic movable joint comprises a first pipe body and a second pipe body which are coaxially arranged and connected together through nuts, an annular rubber pad is clamped between the first pipe body and the second pipe body, a convex ring is formed on the end face, close to the second pipe body, of the first pipe body, and the convex ring and the second pipe body are coaxial and are of an integrated structure; annular grooves with concave axial sections are formed in the two end faces of the pipe body, one end of the convex ring is inserted into the annular grooves, and the annular rubber pad is sleeved outside the convex ring. The hydraulic movable joint has simple structure.

Description

Hydraulic movable joint

Technical Field

The utility model belongs to the field of engineering machinery, and relates to a movable joint, in particular to a hydraulic movable joint.

Background

The loose joint is called union or union, and is a common pipeline connecting piece which can be conveniently installed and detached. The existing loose joint mainly comprises a nut, two pipe fittings connected through the nut and an annular sealing gasket for sealing the connection of the two pipe fittings. When the joint is used for high-pressure fluid delivery, the joint is only sealed by the annular sealing gasket, so that the effect is not ideal, and water leakage is easy to occur.

In this regard, people have realized that the defect is overcome and improved, a loose joint assembly (application number: 202020540197.9) disclosed in China patent library comprises a left pipe and a right pipe which are coaxially arranged, an annular sealing gasket is clamped between the left pipe and the right pipe, a pressing cap is sleeved outside the left end of the right pipe, the pressing cap is in threaded connection with the right pipe, the right end of the left pipe is positioned in the pressing cap, an annular retaining shoulder is formed on the outer side wall of the right end of the left pipe, an annular retaining shoulder is formed on the inner wall of the left end of the pressing cap, and the loose joint assembly is characterized in that a compression ring is arranged between the pressing cap and the left pipe and sleeved outside the left pipe, a positioning ring is integrally formed on the outer side wall of the left pipe, the positioning ring and the compression ring are coaxially arranged, and two end faces of the positioning ring are respectively in tight contact with the annular retaining shoulder and the annular retaining shoulder to form a seal; the inner side wall of the compression ring is provided with a section of conical surface I with the diameter gradually decreasing from left to right, the outer side wall of the left pipe is provided with a conical surface II matched with the conical surface I, and the conical surface I and the conical surface II are tightly contacted to form a seal.

The joint component uses the combined actions of the conical surface I and the conical surface II to tightly contact, the positioning ring is clamped between the annular pressing shoulder and the annular blocking shoulder and the annular sealing gasket to form a plurality of seals and prolong the sealing path, thereby effectively avoiding leakage and well solving the problems, but simultaneously, components and corresponding sealing structures are added, so that the whole structure becomes more complex and is unfavorable for assembly.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a hydraulic movable joint with a simple structure.

The aim of the utility model can be achieved by the following technical scheme: the hydraulic movable joint comprises a first pipe body and a second pipe body which are coaxially arranged and connected together through nuts, and an annular rubber pad is clamped between the first pipe body and the second pipe body; annular grooves with concave axial sections are formed in the two end faces of the pipe body, one end of the convex ring is inserted into the annular grooves, and the annular rubber pad is sleeved outside the convex ring.

Only by arranging the convex ring integrally formed on the first pipe body and matching with the annular groove arranged on the second pipe body, a layer of blocking barrier can be formed on the inner side of the annular rubber gasket, the fluid impact on the annular rubber gasket is effectively weakened, therefore, the deformation amount of the annular rubber gasket is reduced, the sealing effect formed between the first pipe body and the second pipe body is effectively ensured, the service life of the annular rubber gasket can be prolonged, and the sealing device has the advantages of being simple in structure and convenient to install.

In the hydraulic movable joint, the groove width of the annular groove is slightly larger than the thickness of the convex ring.

In the hydraulic movable joint, central axes of the annular groove and the convex ring are collinear, so that a very small gap is formed between the two side walls of the annular groove and the convex ring, the friction resistance applied during assembly can be reduced, the whole assembly is easy, the difficulty of fluid flowing to the annular rubber pad can be increased, the impact force applied to the annular rubber pad is further reduced, and the joint structure is more stable.

In the hydraulic movable joint, the inner side wall of the annular rubber pad is matched with the outer side wall of the convex ring and is stuck together, so that the annular rubber pad can precisely move in place at one time.

In the hydraulic movable joint, the second pipe body is provided with the baffle ring which is coaxial with the second pipe body and is integrally formed on the inner side wall of the annular groove, and the baffle ring is used for reinforcing the strength of the inner side wall of the second pipe body at the annular groove and ensuring the structural strength of the second pipe body.

In the hydraulic movable joint, the inner side wall of the baffle ring is a conical surface with the diameter gradually decreasing from the pipe body to the second direction of the pipe body, and the minimum inner hole of the baffle ring is larger than the caliber of the port of the first pipe body, which is close to the second pipe body. When in actual use, the fluid is discharged from the first pipe body, and by adopting the design, the fluid of the first pipe body can be smoothly discharged into the second pipe body, so that the fluid is prevented from being blocked, and the impact force of the annular rubber pad is further reduced.

In the hydraulic movable joint, the end part of the first pipe body, which is far away from the second pipe body, is provided with the external thread, so that the first pipe body is convenient to be connected with other pipelines.

Compared with the prior art, the hydraulic movable joint has the following advantages:

1. only by arranging the convex ring integrally formed on the first pipe body and matching with the annular groove arranged on the second pipe body, a layer of blocking barrier can be formed on the inner side of the annular rubber gasket, the fluid impact on the annular rubber gasket is effectively weakened, therefore, the deformation amount of the annular rubber gasket is reduced, the sealing effect formed between the first pipe body and the second pipe body is effectively ensured, the service life of the annular rubber gasket can be prolonged, and the sealing device has the advantages of being simple in structure and convenient to install.

2. The central axes of the annular groove and the convex ring are collinear, the groove width of the annular groove is slightly larger than the thickness of the convex ring, and a very small gap is formed between the two side walls of the annular groove and the convex ring, so that the friction resistance applied during assembly can be reduced, the whole assembly is easy, the difficulty of fluid flowing to the annular rubber pad can be increased, the impact force applied to the annular rubber pad is further reduced, and the joint structure is more stable.

Drawings

Fig. 1 is a schematic perspective view of the hydraulic movable joint.

Fig. 2 is a schematic cross-sectional view of the present hydraulic union.

Fig. 3 is an enlarged schematic view of the structure at a in fig. 2.

In the figure, 1, a first pipe body; 1a, a convex ring; 2. a second pipe body; 2a, a limiting seat; 2b, an annular groove; 2c, a baffle ring; 2c1, a conical surface; 3. a nut; 3a, annular blocking edges; 4. an annular rubber pad.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1, the hydraulic movable joint comprises a first pipe body 1, a second pipe body 2, a nut 3 and an annular rubber pad 4. Wherein, body one 1 and body two 2 are straight tubular and both coaxial setting.

In particular the number of the elements,

external threads are arranged at two ends of the first pipe body 1; the outer side wall of the end part of the second pipe body 2, which is close to the first pipe body 1, is provided with a circular limiting seat 2a, and the limiting seat 2a and the second pipe body 2 are coaxial. The annular rubber gasket 4 is positioned between the first pipe body 1 and the second pipe body 2, the nut 3 is in threaded connection with the first pipe body 1, the annular blocking edge 3a is arranged on the inner side wall of the nut 3, and the annular blocking edge 3a is pressed on the limiting seat 2a, so that two end faces of the annular rubber gasket 4 are respectively pressed on the end face of the first pipe body 1 and the end face of the second pipe body 2, and reliable sealing is formed between the first pipe body 1 and the second pipe body 2.

As shown in fig. 2 and 3, a convex ring 1a is formed on the end surface of the first pipe body 1, which is close to the second pipe body 2, and the convex ring 1a and the first pipe body 1 are coaxial and are of an integrated structure. An annular groove 2b with a concave axial section is formed in the end face of the second pipe body 2, namely the annular groove 2b is composed of two opposite side walls and a bottom wall between the two side walls. One end of the convex ring 1a is inserted into the annular groove 2b, and the annular rubber pad 4 is sleeved outside the convex ring 1 a.

Through the design, only the convex ring 1a integrally formed on the first pipe body 1 is matched with the annular groove 2b formed on the second pipe body 2, a barrier can be formed on the inner side of the annular rubber gasket 4, fluid impact received by the annular rubber gasket 4 is effectively weakened, and accordingly deformation of the annular rubber gasket 4 is reduced, sealing effects formed between the first pipe body 1 and the second pipe body 2 are effectively ensured, the service life of the annular rubber gasket 4 can be prolonged, and the sealing device has the advantages of being simple in structure and convenient to install.

Further, the inner side wall of the annular rubber gasket 4 is matched with the outer side wall of the convex ring 1a and stuck together, so that the annular rubber gasket 4 is accurately installed in place at one time. The inner side wall of the annular rubber pad 4 and the outer side wall of the convex ring 1a are preferably matched with each other in circumferential surfaces.

As shown in fig. 2 and 3, central axes of the annular groove 2b and the convex ring 1a are collinear, and the groove width of the annular groove 2b is slightly larger than the thickness of the convex ring 1a, at this time, a very small gap is formed between two side walls of the annular groove 2b and the convex ring 1a, so that friction resistance applied during assembly can be reduced, the whole assembly is easier, the difficulty of fluid flowing to the annular rubber pad 4 can be increased, the impact force applied to the annular rubber pad 4 is further reduced, and the joint structure is more stable. In actual products, the distance between the side wall of the annular groove 2b and the convex ring 1a is 0.2 mm-0.5 mm.

As shown in fig. 2 and 3, a baffle ring 2c is integrally formed on the inner side wall of the second pipe body 2 at the annular groove 2b, and the baffle ring 2c is coaxial with the second pipe body 2 and is used for reinforcing the strength of the inner side wall of the second pipe body 2 at the annular groove 2b and ensuring the structural strength of the second pipe body 2. Preferably, the inner side wall of the baffle ring 2c is a conical surface 2c1 with the diameter gradually decreasing from the first pipe body 1 to the second pipe body 2, and the minimum inner hole of the baffle ring 2c is larger than the caliber of a port of the first pipe body 1, which is close to the second pipe body 2. When in actual use, the fluid is discharged from the first pipe body 1, and by adopting the design, the fluid of the first pipe body 1 can be smoothly discharged into the second pipe body 2, so that the fluid is prevented from being blocked, and the impact force born by the annular rubber gasket 4 is further reduced.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The hydraulic movable joint comprises a first pipe body (1) and a second pipe body (2) which are coaxially arranged and connected together through a nut (3), and an annular rubber pad (4) is clamped between the first pipe body (1) and the second pipe body (2), and the hydraulic movable joint is characterized in that a convex ring (1 a) is formed on the end surface, close to the second pipe body (2), of the first pipe body (1), and the convex ring (1 a) and the first pipe body (1) are coaxial and are of an integrated structure; an annular groove (2 b) with a concave axial section is formed in the end face of the second pipe body (2), one end of the convex ring (1 a) is inserted into the annular groove (2 b), and an annular rubber pad (4) is sleeved outside the convex ring (1 a).

2. A hydraulic union according to claim 1, characterized in that the groove width of the annular groove (2 b) is slightly greater than the thickness of the collar (1 a).

3. A hydraulic union according to claim 2, characterized in that the central axes of both the annular groove (2 b) and the collar (1 a) are collinear.

4. The hydraulic union according to claim 1, characterized in that the inner side wall of the annular rubber pad (4) and the outer side wall of the collar (1 a) are matched and stuck together.

5. The hydraulic movable joint according to claim 1, wherein a baffle ring (2 c) is integrally formed on the inner side wall of the second pipe body (2) at the annular groove (2 b), and the baffle ring (2 c) is coaxial with the second pipe body (2).

6. The hydraulic movable joint according to claim 5, wherein the inner side wall of the baffle ring (2 c) is a conical surface (2 c 1) with the diameter gradually decreasing from the first pipe body (1) to the second pipe body (2), and the minimum inner hole of the baffle ring (2 c) is larger than the caliber of the port of the first pipe body (1) close to the second pipe body (2).

7. A hydraulic union according to claim 1, characterized in that the end of the first tube body (1) remote from the second tube body (2) is provided with an external thread.